Typical Electrostatic Voltage Levels - HP Compaq NC4010 Maintenance And Service Manual

Material-handling packages.
Nonconductive plastic bags, tubes, or boxes.
Metal tote boxes.
Electrostatic voltage levels and protective materials.
Table 4-1 shows how humidity affects the electrostatic voltage
levels generated by different activities.
Event
Walking across carpet
Walking across vinyl floor
Motions of bench worker
Removing DIPS from plastic tube
Removing DIPS from vinyl tray
Removing DIPS from Styrofoam
Removing bubble pack from PCB
Packing PCBs in foam-lined box
A Product can be degraded by as little as 700 volts.
Maintenance and Service Guide

Typical Electrostatic Voltage Levels

Removal and Replacement Preliminaries
Table 4-1
10%
35,000 V
12,000 V
6,000 V
2,000 V
11,500 V
14,500 V
26,500 V
21,000 V
Relative Humidity
40%
15,000 V
5,000 V
800 V
700 V
4,000 V
5,000 V
20,000 V
11,000 V
55%
7,500 V
3,000 V
400 V
400 V
2,000 V
3,500 V
7,000 V
5,000 V
4–7